Low
Stand-by on Potterton Envoy 30

Your boiler is currently in idle mode and waiting for a signal from your thermostat or hot water timer to start working.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed

Monitor it

This is a minor fault. Keep an eye on it and mention it at your next annual boiler service. Reset the boiler and see if it clears.

What the manual says

Manufacturer manual

Control Status: Stand-by

From this model's manual
Verified against the Potterton/Potterton Envoy 30 installation & service manual.
Plain-English guidance below. Severity, DIY steps, costs and parts are our interpretation to help you act, not text from the manual.

DIY fix possible

Check your room thermostat is set to a higher temperature than the current room temperatureEnsure your heating programmer or timer is set to 'On' for the current timeConfirm that your hot water cylinder thermostat is turned up if you have a separate hot water tank

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All 31 fault codes on the Envoy 30

Seeing a different code? Every code this model can display, in one place.

Blocking ErrorBurner OnC1C2C3Case sensorCase temperatureControl failedDisplay not illuminatedDry fireDry fire sensorFan OverrunFan PurgeFan speedFlame lossFLASHINGFlow sensorGas OnHot Surface IgniterIgnition Pre ChecksLockoutOverheatPump Overrun - Central HeatingPump Overrun - Storage TankReturn sensorSensorSensor FlowSensor Flow or return sensorShorted signalWiring fault

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